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EMG Signal Recorder

Hardware

By @yaasshh

  • 1 Devlogs
  • 1 Total hours

Reads raw muscle electrical signals (EMG) from a forearm electrode cuff, processes them through a 4-stage analog signal chain, classifies the gesture using a random forest running on the ESP itself.
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@yaasshh on EMG Signal Recorder

1h 4m 46s logged

So first Dev-Post,

I am building a signal recorder for electromyography (EMG) signals, which are essentially the electrical impulses that muscles produce when you contract or relax. I am recording those signals through electrodes on an arm that will be connected to a circuit I am currently working on.

My plan is to:

  1. Create and test the circuit
  2. Convert it into a PCB that I can manufacture to be quite small
  3. Integrate it into a bunch of my own projects
  4. Make it open source so other people can use it in the future

So far, two stages have been completed:

  1. Stage Zero: 2.5V bias circuit
  2. Stage 1: INA (instrumentation amplifier) circuit and setup
  3. Stage 2: 20Hz notch filter
@yaasshh

So first Dev-Post,

I am building a signal recorder for electromyography (EMG) signals, which are essentially the electrical impulses that muscles produce when you contract or relax. I am recording those signals through electrodes on an arm that will be connected to a circuit I am currently working on.

My plan is to:

  1. Create and test the circuit
  2. Convert it into a PCB that I can manufacture to be quite small
  3. Integrate it into a bunch of my own projects
  4. Make it open source so other people can use it in the future

So far, two stages have been completed:

  1. Stage Zero: 2.5V bias circuit
  2. Stage 1: INA (instrumentation amplifier) circuit and setup
  3. Stage 2: 20Hz notch filter

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